MANUFACTURE OF HEAT COLLECTING PIPE FOR SOLAR HEAT

• Main Author: YONEZAWA MASATOSHI
• Format: Patent
• Language: English
• Published: 05.07.1983
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; PUNCHING METAL; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

PURPOSE:To manufacture a solar heat collecting pipe having excellent heat transferring characteristics in low cost, by housing a heat storing pipe in a recessed groove of a heat collecting fin, and making both tips of a pair of mutually opposing pieces provided along the groove meet together on the outer peripheral surface of the heat storing pipe, and cold press-welding the tips. CONSTITUTION:In a heat collecting fin consisting of aluminum material, etc. and having heat collecting flanges 2 and a recessed groove 1, a pair of opposing pieces 3 and 3 mutually opposing in a strip-shape from the opening end of the groove 1 is provided, and a heat storing pipe B made of copper, etc. is housed in said groove 1. Next, said pieces 3 and 3 are rolled mutually from the outsides to make both tip parts 3b and 3b of the pieces 3 and 3 meet, while bringing the inner surface 1a of the groove 1 and the inner surfaces 3a and 3a of the base end-parts of pieces 3 and 3 into close contact with the outer peripheral surface b1 of the pipe B. Next, the root parts 3c and 3c of met parts of the opposing pieces 3 and 3 are cold press-welded in the direction of the axial line of the pipe B to joint them. The tip part D of the upper part from the jointed part C is cut and removed according to demand.